Rate limiting with express-rate-limit - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the express-rate-limit package.

Express

const rateLimit = require('[1]');

Drag options to blanks, or click blank then click option'

Aexpress-rate-limit

Bexpress

Crate-limit

Dexpress-rate

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'express' instead of 'express-rate-limit'.

Using incomplete or incorrect package names.

The package name to import for rate limiting in Express is express-rate-limit.

2fill in blank

medium

Complete the code to create a rate limiter that allows 100 requests per 15 minutes.

Express

const limiter = rateLimit({ windowMs: 15 * 60 * 1000, max: [1] });

Drag options to blanks, or click blank then click option'

A100

B200

C50

D10

Attempts:

3 left

💡 Hint

Common Mistakes

Using a number too low or too high than 100.

Confusing the time window with max requests.

The max option sets the maximum number of requests allowed. Here, it should be 100.

3fill in blank

hard

Fix the error in applying the rate limiter middleware to all routes.

Express

app.use([1]);

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Alimiter()

BrateLimit()

CrateLimiter

Dlimiter

Attempts:

3 left

💡 Hint

Common Mistakes

Calling the limiter as a function instead of passing it.

Using undefined variables.

The rate limiter is a middleware function stored in limiter. It should be passed directly without calling it.

4fill in blank

hard

Fill both blanks to create a rate limiter that sends a custom message when limit is exceeded.

Express

const limiter = rateLimit({ windowMs: 10 * 60 * 1000, max: 50, [1]: (req, res) => { res.status(429).send([2]); } });

Drag options to blanks, or click blank then click option'

Ahandler

B'Too many requests, please try again later.'

Cmessage

D'Request limit reached.'

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'message' instead of 'handler' for the function.

Passing the message as an option instead of inside the handler.

The handler option defines a function to run when the limit is exceeded. The message is sent as a string in the response.

5fill in blank

hard

Fill all three blanks to create a rate limiter with a 5-minute window, max 20 requests, and a custom message.

Express

const limiter = rateLimit({ windowMs: [1] * 60 * 1000, max: [2], handler: (req, res) => { res.status(429).send([3]); } });

Drag options to blanks, or click blank then click option'

A5

B20

C'You have exceeded the request limit, please wait.'

D'Limit exceeded, try again later.'

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up windowMs and max values.

Using incorrect message strings.

The windowMs is set to 5 minutes (5 * 60 * 1000 ms), max requests is 20, and the handler sends a custom message string.